Trying to export rigged model to FBX. But it keeps spitting out weird errors
&lt;genexpr&gt;
    elem_data_single_int32_array(lay_uv, b&quot;UVIndex&quot;, (uv2idx[uv_id] for uv_id in _uvtuples_gen(t_luv, t_lvidx)))
KeyError: ((nan, nan), 43)

The first (bottom) error suggests there are errors in the UV map. Try recreating the UV map. The FBX export module requires a valid UV unwrapping for all vertices in the model. Go into the UV Unwrap tab and re-unwrap your model(s).